Prologue
Those who live in the shadows and dwell in the darkness
To what extent does the heart reach until it subsides into full darkness. To what limit does the will last until the darkness consumes it? The heartless will always exist no matter what anyone does to exterminate them. There is a shadow in everyone's heart, that can subside into the darkness and turn into a heartless.
To why is it when a person reaches total darkness, a nobody is formed? Nobodies have proven to still shed light into their bodies, therefore having a heart. Roxas is a good example of this metamorphosis
But what if the nobody does indeed have a heart, and it is corrupted yet again into darkness. What is formed then? An evil of unspeakable horrors or a light into the future? Mankind may never know, but I will call them Twils.